Comparison

t vs OSLA

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

t

Explore the features of an insulin pump's touchscreen interface without needing a prescription. This app is ideal for individuals with diabetes, their caregivers, or healthcare professionals to understand pump functionality.

Highlights
  • Explore touchscreen interface
  • Demonstrates pump features
  • No prescription required
  • Educational tool
  • Mobile device compatible
Features
Read full description

The t:simulator™ App is an easy way to explore the simple touchscreen interface of the t:slim X2™ Insulin Pump from Tandem Diabetes Care, no prescription or insurance verification required! Whether you’re a person living with diabetes, a relative or caregiver, or a healthcare provider, we make it simple to explore the t:slim X2 Pump’s features on your mobile device. THIS APPLICATION IS FOR DEMONSTRATION PURPOSES ONLY. IT SHOULD NOT BE USED FOR THERAPY DECISIONS. Due to the variety of sizes of compatible devices, the t:simulator App may not display the pump at actual size. Actual size is 2” x 3.13”. Please refer to the Technical Specifications in the Resources section of the app for more detailed information.

About

OSLA

Features
Read full description

OSLA measures the surface area of ocular surface lesions from a photo. Capture a close-up of the eye, mark the iris as an 11.5 mm reference, trace the lesion, and OSLA reports the area in square millimetres. Built for eye care clinicians and researchers who need a consistent, repeatable way to document lesion size in clinic or in the field. How it works: - Capture with the guided camera (near focus lock, flash at capture) or pick an existing photo - Draw around the iris. Its 11.5 mm average diameter sets the real-world scale - Trace the lesion freehand, or tap point by point - Read the area in square millimetres, with maximum and minimum dimensions The saved photo includes the annotations and a small measurement card, so the result can go straight into your records. Everything runs on the device. No account, no upload, no tracking. Photos stay on your phone unless you choose to share them. OSLA is useful for documenting and monitoring conditions such as ocular surface squamous neoplasia, pterygium and conjunctival naevi. It is a documentation aid for clinicians, not a diagnostic device, and it does not replace clinical judgement.

Screenshots

t3 screens
OSLA4 screens

Verdict

The call

The clearest difference is update cadence: OSLA at daily against t's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

t ships an update every 2 months, OSLA daily. The most recent releases landed on October 13, 2026 and September 18, 2026 respectively.

Scorecard1 real difference · 9 level
t versus OSLA: the parameters behind the verdict, then further details
ParametertOSLA
PriceFreeFree
Rating3.6 (116 ratings) — better—
Positive reviews42.4% of reviews—
Number of ratings116 — better—
Update frequencyEvery 2 monthsDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size31 MB19 MB
Age rating4+17+
DeveloperTandem Diabetes Care, Inc.Chun-Huei Liu

Bugs and requests

t

Reported bugs

13 issues
  • App won't open once downloaded
  • Simulator crashes on launch
  • App broken on iOS 12
  • Simulator app broken on iOS 12
  • Simulator crashes as soon as app is open
Show 8 more
  • Simulator not working
  • App crashes when opening on iPhone X
  • Simulator crashes on iOS 12
  • Simulator doesn't work
  • App bombs on launch
  • Lagging and not working properly
  • Doesn't update as often
  • US version installed on iPhone, needs German version

Requested features

14 requests
  • Actual app to control and manage the pump
  • App available in Canada/Europe
  • Display beep noises for alerts
  • Simulate real-world issues like occlusions
  • Ability to simulate changing the pump
Show 9 more
  • Bolus from the app
  • Option to change mmol/l to mg/dl
  • Bluetooth control of the pump
  • App to upload reports from the pump for iPad
  • Integrate with Apple Watch for alerts
  • Actual app that sends information to phone
  • Simulate confirmation screens and alarms
  • More realistic simulation of pump usage
  • Display insulin on board information

OSLA

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

t

No in-app purchases

None

OSLA

No in-app purchases

Questions

Is t free?
t is free to download, with no in-app purchases.
Is OSLA free?
OSLA is free to download, with no in-app purchases.
Do t or OSLA have ads?
Neither t nor OSLA shows ads.
Which is updated more often, t or OSLA?
t ships an update every 2 months, and OSLA daily. Most recently, t was updated on October 13, 2026 and OSLA on September 18, 2026.

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